ABSTRACT
The red-eye effect is a well-known problem in photography. It is often seen in amateur shots taken with a built-in flash, but the problem is also well known to professional photographers. This effect is caused by the reflection of the blood vessels in the retina, usually when a strong and sudden light strikes the eye. Red eye is a function of at least three things:
• Ambient light level. Low level causes the subject’s pupil to open wider to admit more light, exposing the retina.
